Spring Washer Din 127 Weight

Din 9021b a2 a4 fender washer. Standard split lock washers have a left hand helix which means you can only use them with bolts that have right hand threads to prevent clockwise rotation from vibration. Belleville spring lock washers also known as conical washers these have a slightly cupped shape that gives them spring like flexibility to grip tighter than split and tooth lock washers.

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